Cheng Jin – författare

Theory of Nonlinear Propagation of High Harmonics Generated in a Gaseous Medium establishes the theoretical tools to study High-Order Harmonic Generation (HHG) by intense ultrafast infrared lasers in atoms and molecules. The macroscopic propagation of both laser and high-harmonic fields is taken into account by solving Maxwell''s wave equations, while the single-atom or single-molecule response is treated with a quantitative rescattering theory by solving the time-dependent Schrödinger equation.

This book demonstrates for the first time that observed experimental HHG spectra of atoms and molecules can be accurately reproduced theoretically when precise experimental conditions are known. The macroscopic HHG can be expressed as a product of a macroscopic wave packet and a photorecombination cross section, where the former depends on laser and experimental conditions while the latter is the property of target atoms or molecules. The factorization makes it possible to retrieve microscopically atomic or molecular structure information from the measured macroscopic HHG spectra.

This book also investigates other important issues about HHG, such as contributions from multiple molecular orbitals, the minimum in the HHG spectrum, the spatial mode of laser beams, and the generation of an isolated attosecond pulse. Additionally, this book presents the photoelectron angular distribution of aligned molecules ionized by the HHG light.

This book provides a historical economic analysis of two key issues relating to township and village enterprise (TVE) development in China. Firstly, the nature of the evolving relationship between TVEs and local government; in particular how TVE entrepreneurs have used institutionalized power to secure the political influence needed to defend their financial independence. Secondly, the relationship between TVEs and state-owned enterprises (SOEs), and the role of SOEs in China’s economic transition.

This study highlights the importance of the role of SOEs in the “dual-track pricing system” and its impact on other parts of the economy. Township and village enterprises were key to China''s success in the late twentieth century, but have more or less disappeared as an entity over the past decade or so. By measuring the structural difference of the SOE sector before and after 1998–2003 SOE reform, Jin explains their fast catch-up in productivity since the mid-1990s, as well as